content: Cleanup class/struct forward declarations

content/browser/indexed_db/indexed_db_dispatcher_host.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 12 matching lines @@
 #include "storage/browser/blob/blob_data_handle.h"
 #include "url/gurl.h"
 
 namespace url {
 class Origin;
 }
 
 namespace content {
 class IndexedDBBlobInfo;
 class IndexedDBCallbacks;
-class IndexedDBConnection;
 class IndexedDBContextImpl;
 class IndexedDBDatabaseCallbacks;
 
 // Handles all IndexedDB related messages from a particular renderer process.
 class IndexedDBDispatcherHost
     : public BrowserMessageFilter,
       public BrowserAssociatedInterface<::indexed_db::mojom::Factory>,
       public ::indexed_db::mojom::Factory {
  public:
   // Only call the constructor from the UI thread.
@@ skipping 100 matching lines @@
 
   // Used to set file permissions for blob storage.
   int ipc_process_id_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_DISPATCHER_HOST_H_